Peterson Tours Box 825, Willmar MN 56201 Rhubarb Festival & Amish Tou... June 1 Duluth & North Shore Alabama.. June 26 Duluth Airshow & Blue Angels.Jl 20 Mackinac Island August 19-22 Fall Black Hills & www.petersontours.com Call 1-888-425-8747 Peterson Tours Box 825, Willmar MN 56201 Rhubarb Festival & Amish Tou... June 1 Duluth & North Shore Alabama.. June 26 Duluth Airshow & Blue Angels.Jl 20 Mackinac Island August 19-22 Fall Black Hills & www.petersontours.com Call 1-888-425-8747